How do you add the icon in the display format of a state?
What I do is go to add new automation command and find the symbol I want to use then copy it and paste it elsewhere.
When I copy from the Symbol drop down in the navigation settings it paste a square for anything that I select.
I found this post Symbol Fonts missing (Segoe UI Symbol) - #8 by QMcKay but many of the symbols that I try to paste still just paste a square. Some are working but not the ones I would like.
Many of these work with simple copy and paste. Cool Symbols & Cool Fonts - Symbols, Emoji & Fonts ✮✢❂✶✧